AggregateProjectionSplit (arcadedb-engine 22.1.2 API)

java.lang.Object
- com.arcadedb.query.sql.parser.AggregateProjectionSplit

```
public class AggregateProjectionSplit
extends Object
```
This class is used by the query planner to split projections in three parts:
- pre-aggregate projections
- aggregate projections
- post-aggregate projections
An example: select max(a + b) + (max(b + c * 2) + 1 + 2) * 3 as foo, max(d) + max(e), f from " + className will become <p> a + b AS _$$$OALIAS$$_1, b + c * 2 AS _$$$OALIAS$$_3, d AS _$$$OALIAS$$_5, e AS _$$$OALIAS$$_7, f <p> max(_$$$OALIAS$$_1) AS _$$$OALIAS$$_0, max(_$$$OALIAS$$_3) AS _$$$OALIAS$$_2, max(_$$$OALIAS$$_5) AS _$$$OALIAS$$_4, max(_$$$OALIAS$$_7) AS _$$$OALIAS$$_6, f <p> _$$$OALIAS$$_0 + (_$$$OALIAS$$_2 + 1 + 2) * 3 AS `foo`, _$$$OALIAS$$_4 + _$$$OALIAS$$_6 AS `max(d) + max(e)`, f
Author:

Luigi Dell'Aquila (luigi.dellaquila-(at)-gmail.com)

Field Summary

Fields
Modifier and Type	Field	Description
`protected List<ProjectionItem>`	`aggregate`
`protected static String`	`GENERATED_ALIAS_PREFIX`
`protected int`	`nextAliasId`
`protected List<ProjectionItem>`	`preAggregate`

Constructor Summary

Constructors
Constructor Description

AggregateProjectionSplit()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`List<ProjectionItem>`	`getAggregate()`
`Identifier`	`getNextAlias()`
`List<ProjectionItem>`	`getPreAggregate()`
`void`	`reset()`	clean the content, but NOT the counter!
`void`	`setAggregate(List<ProjectionItem> aggregate)`
`void`	`setPreAggregate(List<ProjectionItem> preAggregate)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GENERATED_ALIAS_PREFIX

protected static final String GENERATED_ALIAS_PREFIX

See Also:: Constant Field Values

nextAliasId
```
protected int nextAliasId
```

preAggregate

protected List<ProjectionItem> preAggregate

aggregate

protected List<ProjectionItem> aggregate

Constructor Detail
- AggregateProjectionSplit
```
public AggregateProjectionSplit()
```

Method Detail

getNextAlias
```
public Identifier getNextAlias()
```

getPreAggregate

public List<ProjectionItem> getPreAggregate()

setPreAggregate

public void setPreAggregate(List<ProjectionItem> preAggregate)

getAggregate

public List<ProjectionItem> getAggregate()

setAggregate

public void setAggregate(List<ProjectionItem> aggregate)

reset
```
public void reset()
```
clean the content, but NOT the counter!